Samsung DVD-N501 Service Manual page 26

C
Analog signals
No
are inputed normally at pin 2, 4, 6,
9, 11, 13 in VIC1(J)?
Yes
Power is normal No
at pin 1, 28 in VIC1(J)?
Yes
No
Pin 7, 8 in VIC1(J) is in
Low state?
Yes
Video signals of
No
about 2V appear at pin 16, 18, 20, Check the soldering of
23, 25, 27 in VIC1(J)?
Yes
Video signals of
No
about 1V appear at
output jacks?
Yes
Check the RCA cable.
VIC1(M) ; SAA7128
VIC1(J) ; MM1540
Check the connection between
VIC1(M) and VIC1(J).
Check the connection between
VIC1(J) and Emmiter of PQL58.
Connect to high.
No
VIC1(J).
Change VIC1(J).
Check the connection between
VIC1(J) and output jacks.